W/O微乳液体系稳定条件与纳米镍的制备  

The stabilization conditions of W/O microemulsion system and preparation of nickel nanoparticles

作　　者：周海安[1] 史鸿鑫[1] 项菊萍[1] 武宏科[1] 朱建萍[1] 雷小明[1] 

机构地区：[1]绿色化学合成技术国家重点实验室培育基地浙江工业大学化材学院,浙江杭州310032

出　　处：《工业催化》2005年第5期46-49,共4页Industrial Catalysis

摘　　要：研究了适合于制备纳米金属催化剂的微乳液体系。考察不同体系和不同条件下能稳定存在的组成范围。将镍离子和还原剂的LAS/C5H11OH/二甲苯/H2O微乳液,在80℃下反应4h,制得粒径约20nm的均匀纳米金属镍。该种纳米镍对硝基苯催化加氢的初始速率比雷尼镍高69倍。W/O(water in oil) microemulison systems for preparation of metal nanoparticle catalysts were studied.The composition range for stable existence of different systems under different conditions were investigated.Nickel nanoparticles (about 20 nm) were prepared from the W/O microemulsion of LAS/pentanol/xylene/H_2O system after reaction at 80 ℃ for 4 h.Initial reaction velocity for hydrogenation of nitrobenzene was 60 times higher on the nanoparticle nickel catalyst than on Raney nickel catalyst.

关 键 词：微乳液 稳定性 纳米镍 加氢催化剂 硝基苯加氢 

分 类 号：TQ426.8[化学工程] TQ426.6